h1  {
    text-align: center;
}

table {
    background-color: blanchedalmond;
    color: black;
    font-size: 20px;
    width: 70%;
    margin: 10px auto;
    border-collapse: collapse;
    /* border-collapse:collapse 合并内外边距，
    去除表格单元格默认的2个内外边距   */
}

th, td {
    font-family: 宋体;
    height: 30px;
    line-height: 25px;
    text-align: center;
    border: 1px solid #ccc;
}

th {
    background: palegreen;
    font-weight: normal;
}

tr:hover {
    background: cyan;
}

a {
    text-decoration-line: none;
}

a:hover{
    background: red;
}